Monday, 9 June 2014

System Information Block -5 in LTE (SIB-5)

 Ø  Contains information relevant only for inter-frequency cell re-selection i.e. information about other EUTRA frequencies and inter-frequency neighboring cells relevant for cell re-selection
 Ø  Includes cell re-selection parameters common for a frequency as well as cell specific re-selection parameters


Information’s:

InterFreqCarrierFreqInfo
can be specified upto 8 carrier frequencies
dl-CarrierFreq
carrier frequency helps the UE to search the cells
q-RxLevMin
Minimum RSRP value of the inter-frequency cell. Value -70 to
-22 dBm.
Actual value: signaled value * 2
p-Max
maximum allowed UL transmit power of the cell
t-ReselectionEUTRA
Defines the time to trigger for cell reselection. Value 0 to 7 sec.
t-ReselectionEUTRA-SF
scaling factors for Medium and High mobility
threshX-High
# Threshold (in dB) used by UE for cell re-selection to a HIGHER priority
#  The Srxlev of the candiate cell is greater than threshX_High
# Value 0 to 31 dB. Actual value= Signaled value * 2
threshX-Low
# Threshold (in dB) used by UE for cell re-selection to a LOWER priority
#  Cell re-selection is allowed only when Srxlev of the candiate cell is greater than threshX_Low and RSRP of serving cell is less than the value of ThreshServingLow singalled within SIB3
# Value 0 to 31 dB. Actual value= Signaled value * 2
allowedMeasBandwidth
defined in terms of Resouce blocks associated with a specific channel bandwidth
cellReselectionPriority
defines the priority of the frequency layer
neighCellConfig
information regarding the neighboring cells
q-OffsetFreq
defines the RSRP measurement offset, applied to all cells on the specified RF carrier
interFreqBlackCellList
the mentioned cells are no considered for cell reselection

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